Safety means for treadle operated machinery



2 Sheets-Sheet l z a 2 z. a o 33 b33332 IZI- Q Q Q Q Q Q 5. a w fi 4 MMOct. 17, 1950 H. T. CHISOLM ET AL 2,525,865

SAFETY MEANS FOR TREADLE OPERATED MACHINERY Filed May 17, 1946 2Sheets-Sheet 2 I u rent/11 arZI. 6746 -51 mes JY. Harv-25 y W 6 4a dllomeys Patented Oct. 17, 1950 SAFETY MEANS FOR TREADLE OPERATED MACHINERYHoward '1. Chisolm and James A. Harris, Meridian, Miss.

Application May1'7, 1946, Serial No. 670,638

3 Claims.

This invention relates to improvements in safety appliances, especiallyadapted for use in conjunction with treadle operated machinery.

Heretofore, machine operators, especially those running shirt creasingmachines and other foot treadle controlled machine have been subject tothe jeopardy of persona1 injury, due to the likelihood of accidentallycatching a hand in the pressing apparatus, or burning himself due toaccidental machine.

The, present invention contemplates the provision of means whichprevents the accidental operation of the treadle controlled machine,except when both hands of the operator are in a safe position.

A very important object of the invention is to provide hand releaseknobs, operating detent means for the usual treadle, which necessitatesthe use of both hands of the operator for removing the detent means froma blocking position with respect to the treadle, before the treadle canbe operated.

These and other objects and advantages of the invention will becomeapparent to the reader of the following description.

In the drawings Figure 1 is a fragmentary vertical sectional orhaphazard operation of the view through a work tab e, showing the safetyappliance in front elevation.

Figure 2 is an enlarged fragmentary detailed sectional view through thespring and knob means;

Figure 3 is a fragmentary vertical sectional view through the detentmeans;

Figure 4 is a horizontal sectional view taken substantially on line 4-4!of Figure 3;

Figure 5 is a fragmentary vertical sectional view taken on line 5-5 ofFigure 3;

Figure 6 is an end elevational view of the treadle base and detent meanswith the near connecting rod removed.

Referring to the drawings, reference character A denotes the work tableof a pressing machine,

such as a shirt creasing machine, while reference character B denotes atreadle for operating this type of machine, the same having the usualoperating element C extending therefrom.

As is apparent in Figures 1 and 3, a base 5 is provided at its ends withupstanding pairs of l 2 corner, as at 9, to define a, shoulder Hi,forming an abutment for the treadle B, when th treadle B is not beingsafely operated.

' Figure 3 shows that the outer edge of the block 5 i has a pair ofthreaded openings II for receiving machine screws 12, serving to attachan angular bracket 3 to this edgeof the detent block. 5. The bracket !3is of L-shape with its feet portion disposed outwardlyand twisted as atM. The twisted portion is formed with an opening to receive the lowerlateral portion 15 of. a connecting rod section it and a cotter pin maybe employed for preventing displacement of these parts.

The connecting rod sections it extend upwardly and interlap the lowerinwardly off set portions ll of connecting rods !8, and collars l3embrace these overlapping parts and through the medium of a set screw26, these interlapping parts are firmly clamped together.

The upper ends of the connecting rod sections 18 are connected by eyes2i to eyes 22 at the lower ends of plunger rods 23, which as is shown inFigure 2, extend upwardly entirely through barrels 24, which depend fromthe bottom of the work table A in suitable spaced relation with respectto each other.

The lower end of each barrel 24 has an attached cap 25, apertured toreceive the corresponding plunger rod 23, while an intermediate portionof each plunger rod 23 carries a washer 26, held in place by cross pin2i and between which and the cap 25, a coiled compression spring 28 isinterposed. The purpose of the spring 28 is to hold the rod sections I 6and I8 elevated in order that the detent blocks 7 will be cushion washer32, which is capable of absorbing ears 6, t and between each pair ofears 6, t a m detent block 7 is pivotally mounted, the same beshock whenit strikes the cap 25.

In the operation of this appliance, the operator, in order to free thepedal B, must necessarily push downwardly on each knob 3 Isimultaneously other words, his hands must be occupied in effectingreleasement of the detent means, before his foot can operate the treadleto put the machine in operation, and thus maintaining both handsoccupied, there can be no haphazard or accidental operation of thetreadle, such as might cause injury to the operator, should his hand orhands be in a dangerous position with respect to the pressing element.

As is apparent in Figure 3, the base 5 may have openings therein forreceiving anchoring bolts or other securing elements.

While the foregoing description sets forth the invention in specificterms, it is to be understood that numerous changes in the shape, sizeand materials may be resorted to without departing from the spirit andscope of the invention as claimed hereinafter.

Having described the invention what is claimed as new is:

1. In the machine of the character described comprising an operatorstable, a treadle for controlling the-machine, a pair of swingabledetents for normally holding the treadle against accidental operation, apair of elongated rod lines extending from the table and operativelyconnected to said detents, guide tubes projecting from the table andthrough which the rod lines operate, each of said rod lines beingprovided with an abutment, located within the corresponding tube and acompression spring on each rod line interposed between the bottom of thecorresponding tube and the adjacent abutment.

2. In the machine of the character described comprising an operatorstable, a treadle for controlling the machine, a pair of swingabledetents for normally holding the treadle against accidental operation, apair of elongated rod lines extending from the table and operativelyconnected to said detents, guide tubes projecting from the table andthrough which the rod lines operate,

each of said rod lines being provided with an abutment, located withinthe corresponding tube and a compression spring on each rod lineinterposed between the bottom of the corresponding tube and the adjacentabutment, said rod lines extending above said table and provided withhandles at their upper ends.

3. In the machine of the character described comprising an operatorstable, a treadle for controlling the machine, a pair of swingabledetents for normally holding the treadle against accidental operation, apair of elongated rod lines extending from the table and operativelyconnected to said detents, guide tubes projecting from the table andthrough which the rod lines operate, each of said rod lines beingprovided with an abutment, located within the corresponding tube and acompression spring on each rod line interposed between the bottom of thecorresponding tube and the adjacent abutment, said rod lines beingdivided into sections and means for adjustably connecting of thesections together to determine the throw of said lines.

HOWARD T. CHISOLM. JAMES A. HARRIS.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,016,395 Brown Feb. 6, 19121,147,670 Bassett July 20, 1915 1,401,7 i4 Watson Dec. 27, 19211,441,099 Lawrence Jan. 2, 1923 1,475,l11 Gries et al Nov. 20, 19231,527,925 Schade Feb. 24, 1925 2,020,839 Kahn Nov. 12, 1935 2,225,708Myerson Dec. 24, 1940

